Cembre 2321510 A37-4ESI four-hole non-insulated electrolytic tin-plated copper tube ring terminal for 185 mm² Class 5 and Class 6 flexible copper conductors with an EA specification fixing pattern.
£40.00
The Cembre 2321510, also identified as the Cembre A37-4ESI, is a premium four-hole non-insulated copper tube ring terminal designed for terminating 185 mm² Class 5 and Class 6 flexible copper conductors. As part of Cembre's professional A-4ESI Series, this terminal features a four-hole fixing arrangement manufactured in accordance with Electricity Association (EA) specifications, making it ideal for transformer connections, switchgear and heavy-duty power distribution equipment.
Manufactured from over 99.9% pure electrolytic copper, the terminal is annealed for excellent crimpability and electrolytically tin plated to provide outstanding resistance against oxidation and corrosion. The four-bolt palm offers exceptional mechanical stability while maintaining a low-resistance electrical connection throughout the service life of the installation.
The A37-4ESI incorporates a chamfered cable entry and inspection hole to simplify conductor insertion and verify full cable insertion before crimping. Its extended barrel design enables accurate positioning within compatible Cembre crimping dies, ensuring fast, repeatable and professional-quality installations.
The Cembre A37-4ESI is engineered for transformer and heavy-duty power distribution applications where exceptional mechanical strength and electrical reliability are essential. Its four-hole fixing arrangement distributes clamping forces evenly, preventing terminal movement while ensuring a secure, low-resistance electrical connection.
When installed using compatible Cembre crimping tools and dies, the terminal delivers consistent compression, excellent conductivity and dependable long-term performance in transformers, switchgear, substations, industrial machinery and utility power installations.
| Series | A-4ESI Four-Hole Copper Tube Crimping Lugs |
|---|---|
| Product code | 2321510 |
| Product type | Four-hole non-insulated copper tube ring terminal |
| Conductor cross-section | 185 mm² |
| Fixing configuration | Four-hole EA specification |
| Compatible conductor class | Class 5 & Class 6 flexible copper conductors |
| Material | Annealed electrolytic copper (>99.9% purity) |
| Surface finish | Electrolytic tin plated |
| Palm width (B) | 84 mm |
| Barrel diameter | 19.2 mm |
| Cable stripping length | 35 mm |
| Inspection hole | Yes |
| Cable entry | Chamfered barrel |
| Crimping geometry | Hexagonal or indent |
| Compliance | EA specification, RoHS |
| Insulation | Non-insulated |
| HS Code | 85369010 |
| Country of Manufacture | United Kingdom (includes NI) |
The Cembre 2321510 provides a secure four-bolt crimped termination between a 185 mm² flexible copper conductor and transformer or switchgear connections using an EA specification fixing pattern.
The four-hole design provides maximum mechanical stability and complies with Electricity Association fixing arrangements commonly used on transformers and power equipment.
The terminal is designed for 185 mm² Class 5 and Class 6 flexible copper conductors.
Yes. The integrated inspection hole enables installers to verify that the conductor has been fully inserted before crimping.
The electrolytic tin plating protects the copper against oxidation and corrosion while maintaining excellent electrical conductivity throughout the life of the installation.
Cembre four-hole copper tube terminals are trusted by utility engineers, transformer manufacturers, panel builders and industrial installers for delivering outstanding mechanical stability, reliable conductivity and long-term performance in demanding high-current electrical installations.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...